void main()
{
int a[M],s,n,i;
printf("Enter the number of elements\n ");
scanf("%d",&n);
for(i=0;i<n;i++)
scanf("%d",&a[i]);
hash(a,n);
printf("Enter element to search ");
scanf("%d",&s);
if(dehash(a,s)==1)
printf("FOUND");
else
printf("NOT");
}
/* transform the graph to a shortest-path tree by marking tree edges */
void
mapit()
{ register p_node n;
register p_link l;
p_link lparent;
static int firsttime = 0;
vprintf(stderr, "*** mapping\n");
Tflag = Tflag && Vflag; /* tracing here only if verbose */
/* re-use the hash table space for the heap */
Heap = (p_link *) Table;
Hashpart = pack(0L, Tabsize - 1);
/* expunge penalties from -a option and make circular copy lists */
resetnodes();
if (firsttime++) {
if (Linkout && *Linkout) /* dump cheapest links */
showlinks();
if (Graphout && *Graphout) /* dump the edge list */
dumpgraph();
}
/* insert Home to get things started */
l = newlink(); /* link to get things started */
getlink(l)->l_to = Home;
(void) dehash(Home);
insert(l);
/* main mapping loop */
remap:
Heaphighwater = Nheap;
while ((lparent = min_node()) != 0) {
chkheap(1);
getlink(lparent)->l_flag |= LTREE;
n = getlink(lparent)->l_to;
if (Tflag && maptrace(n, n))
fprintf(stderr, "%s -> %s mapped\n",
getnode(getnode(n)->n_parent)->n_name,
getnode(n)->n_name);
if (getnode(n)->n_flag & MAPPED)
die("mapped node in heap");
getnode(n)->n_flag |= MAPPED;
/* add children to heap */
heapchildren(n);
}
vprintf(stderr, "heap high water mark was %ld\n", Heaphighwater);
/* sanity check on implementation */
if (Nheap != 0)
die("null entry in heap");
if (Hashpart < Tabsize) {
/*
* add back links from unreachable hosts to
* reachable neighbors, then remap.
*
* asymptotically, this is quadratic; in
* practice, this is done once or twice.
*/
backlinks();
if (Nheap)
goto remap;
}
if (Hashpart < Tabsize) {
fputs("You can't get there from here:\n", stderr);
for ( ; Hashpart < Tabsize; Hashpart++) {
fprintf(stderr, "\t%s", getnode(Table[Hashpart])->n_name);
if (getnode(Table[Hashpart])->n_flag & ISPRIVATE)
fputs(" (private)", stderr);
putc('\n', stderr);
}
}
}